--  @testpoint:opengauss关键字action(非保留)，作为函数名
--关键字不带引号-成功
drop function if exists action;
create function action(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function action;

--关键字带双引号-成功
drop function if exists "action";
create function "action"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function "action";

--关键字带单引号-合理报错
drop function if exists 'action';
create function 'action'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `action`;
create function `action`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/